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Articles
Hand combing method
Feb 6th
To thoroughly understand how combing machines carry out the combing process, it is worth mentioning how wool was manually combed in the past. This process included three main operations and precisely: 1. introduction of the fibre tuft in the comb; 2. combing of the head of the fibre tuft; 3. More >
Spinning–twisting machine
Feb 6th
The twisting of a fancy yarn can also be accomplished using a machine that combines the two processes, ring and hollow spindle. In this case the first operation is carried out by the hollow spindle, preceded by the core and effect yarn feeding group. Below the hollow spindle, which holds More >
How Does Finisher Card
Feb 6th
This card, again entirely provided with needles clothings, is generally made up of a drum preceded by a fly cylinder with a pair of worker-stripper cylinders, and it serves to obtain a sliver that is as highly processed as possible. The purpose of the divider (Figure 1) is to split More >
General remarks of the carding processprocess
Feb 3rd
Through the carding process, the washed, dried and oiled tufts of wool made of random and entangled fibres finally become a “card sliver” where fibres are straightened and aligned along the longitudinal axis of the sliver. This operation is carried out with a “card”, a machine which processes the fibres More >
How Work Friction Spinning Machine
Feb 3rd
The friction spinning machine (Figure 1) operates on the basis of a principle of mechanical/aerodynamic spinning. Being an open-end spinning machine, it effects direct transformation of sliver into yarn and delivers, at high speed, very large packages.
A rotating carding cylinder (1) breaks up the sliver applying a high draft between More >
The intermediate card and epurator
Feb 3rd
Fig. 1 Pneumatic epurator
The purpose of the conveyor that transports the material from the breaker card to the intermediate card is precisely to feed the web to the second machine, by means of condensation on an endless tape doubled with other tapes, in such a way that the fibres are More >
3dtv | 3d tv| 3d-tv
Feb 2nd
Sony and ESPN both have revealed their latest plans to create television networks entirely devoted to 3D TV programming. (more…)
Report exposes dismal rural education survey of students’ learning outcomes in Urdu, English and arithmetic
Feb 2nd
LAHORE, Feb 1: A survey of students’ learning outcomes in Urdu, English and arithmetic on provinces level shows serious problems in the governments’ approach towards achieving literacy targets, while it highlights the fact that students in Sindh villages are lagging far behind students in the rural districts of Punjab, Balochistan More >
General remarks process
Feb 1st
Through the combing process, the card sliver is stripped from residual foreign matter as well as from fibres shorter than a pre-set length. During this operation all the fibres are straightened and parallelised with respect to the longitudinal axis of the sliver, that at the end of the process is More >
The so-called oiling process
Feb 1st
At the exit of the opener-beater, fibres can condense and consolidate attracted by the scales now freed from the yolk; they can attract or reject each other depending on the electrostatic charges generated on their surface due to the friction between them or with other bodies. To be rid of More >
Twisted fancy yarns
Feb 1st
The classic fancy yarn is a twisted yarn made up of at least three yarns; of these, one serves as a support and is called the core; this is twisted with a second, usually overfed, yarn to create the desired design, this is called the effect. A second twisting stage More >
Student counselling a basic requirement in a country like Pakistan
Jan 31st
EDUCATION plays a pivotal role in the journey of one’s life. However, in a country like Pakistan where the education system at almost every level continues to be a shambles, it becomes nearly impossible to save and polish budding talents. This deterioration has further intensified with the lack of student More >
How does The Breaker Card
Jan 30th
The breaker card, fed, via the conveyor, by the loader, is made up of two drums connected by a conveyor cylinder. The first drum, equipped with a feeder group and a series of working-stripping cylinder pairs, makes up the pre-carding unit, and is entirely wired. It opens further the material More >
Sectional warping
Jan 30th
As already mentioned, by this warping system several ?sections? are wound in sequence and parallel to each other on a dresser or on a drum; the warping sections are as many as necessary to obtain, with the available creel capacity, the total number of threads composing the warp. Sectional warping More >
Use of Control Devices
Jan 28th
Metal probes, placed on the delivery side of the drying unit, are used for controlling the dried wool moisture content (which must be uniform and predetermined); these probes measure the electrical capacity or resistance fluctuations, which vary according to the quantity of water contained in the fibres. It is however More >
Hollow spindle twisting machine
Jan 28th
In this machine the hollow spindle with the binder yarn is positioned between two pairs of cylinders, while a hook, below the spindle and rotating in the same direction, twists the core and effect yarn (Figure 1).
Fig. 1 Principle of the hollow spindle twisting machine
Given the intermediate position of the More >
Method of Pre-opening
Jan 28th
The bale opener (Figure 1) includes the “To” two-section horizontal conveyor on which the greasy wool bales are loaded; the bales pass from one sector to the following one and are turned upside down and are partially divided into big tufts of wool.
Fig. 1 – Bale opener
The “To” conveyor conveys More >
The carding room equipment
Jan 28th
Carding room equipment can traditionally be broken down into three machines (or sometimes just two, when the raw material requires less intensive treatment) and a number of drums that is determined by the type of processing being carried out. The carding action is repeated a number of times on each More >
Types of Spun Fancy Yarns
Jan 27th
In the preparation stage, it is possible to create two types of fancy yarn: yarns with loose hairs and knop yarns. In the first case, the effect is obtained by adding loose hairs to the blend, giving the yarn a fuzzy appearance and a silky hand. The presence of loose More >
Method of Short Fibre Drafting
Jan 27th
In this case, the rovings are not very cohesive or strong, therefore drafting must necessarily be very reduced (usually carried out at rates of between 20% and 50%) and supported by special fibre control devices. The shorter length of the raw material does not generally allow the fibres to be More >
How do work loader with cunt
Jan 27th
The equipment is fed by a loader, which has to deliver a precise amount of fibre blend in a given unit of time to guarantee accurate and continuous production of the required count. This necessity is the result of the continuity of production, which does not allow, while the machine More >
There are two types of clothing for cards
Jan 27th
The sawtoothlike wire and the flexible clothing. Flexible lothings (Figure 1) have needles embedded in a base strip, made up of layers of felt or flexible material.
Fig. 1 Flexible clothings
Wires (Figure 2) are made up of a steel thread with sharp-edged teeth. This makes them quite wear-resistant. When it comes More >
Public vs private sector employees
Jan 27th
EVERY year the government increases salaries of public-sector employees who take home handsome pay. But miseries of private-sector employees are increasing day by day.
The government has fixed Rs7,000 as the minimum salary. Private-sector authorities do not abide by the government’s notification. They are not paying Rs7,000 as salary to their More >
75pc children unable to read English sentence 58 per cent children cannot read a sentence in Urdu: report
Jan 27th
ISLAMABAD, As many as 58 per cent children in the country cannot read a sentence in Urdu or in their regional language while 75 per cent are unable to read a sentence in English.
This was revealed in a survey report launched by South Asia Forum for Education Development managed by More >
How is Operation of the card
Jan 26th
The card used in woollen spinning is traditionally the sort with cylinders (covered with clothings that are angled to varying degrees), which rotate at different speeds, effecting the three cardinal actions: carding, stripping and raising. Appropriately combined, these three actions allow opening of the tufts, continuous detachment of the fibres More >
Carding plays a crucial role in all spinning cycles
Jan 26th
Carding fulfils a series of precise objectives, serving:
* to open the blend fibres fully and definitively * to arrange (as far as their length allows) the fibres parallel with one another * to remove impurities * to blend the raw material further * to reduce the blend to a web More >
Automation and safety process
Jan 26th
In an automatic preparation cycle, the only intervention on the part of the operator is to supply the bale plucker with bales, while the prepared material, delivered by the storage boxes, is fed directly to the hoppers that supply the carding room equipment loaders, thereby creating a direct link with More >
Storage and carding room supplying
Jan 26th
Leaving the blending chambers, the fibre can once again be put through the opening machines, or if it needs further homogenisation (this applies particularly if one of the components is present in only a very small proportion), submitted to a second or even third blending and relative picking. Finally, the More >
